Development

Gina Krog is a field on the Utsira High in the central part of the North Sea, just north of the Sleipner Vest field. The water depth is 120 metres. Gina Krog was discovered in 1978, and the plan for development and operation (PDO) was approved in 2013. The field is developed with a fixed platform with living quarters and processing facilities. The production started in 2017. An amended PDO for an alternative oil export solution was approved in 2022. Since 2023, Gina Krog is fully electrified by power from shore via the Johan Sverdrup field. Sleipner has been partly supplied with power from shore via the Gina Krog platform since 2024.

Reservoir

Gina Krog produces oil and gas from sandstone of Middle Jurassic age in the Hugin Formation. The field is structurally complex and segmented, and the reservoir depth is 3300-3900 metres. Reservoir thickness and quality are varying.

Recovery strategy

The field has earlier been produced by gas injection in most reservoir segments. Since 2021, all segments are produced by pressure depletion.

Transport

Stabilised oil had earlier been transported to a floating storage and offloading vessel (Randgrid FSO). After installation of a new oil pipeline in 2024, both oil and rich gas are now transported in pipelines to the Sleipner A facility. Sales gas is exported from Sleipner A via Gassled (Area D) to the market, while oil is exported to the Kårstø terminal.

Status

Gina Krog is producing at gas plateau; oil production, however, is declining. To keep the gas production at plateau, all gas injectors have been converted into production wells. The use of gas lift is being evaluated for some of the wells. In 2024, a new oil pipeline to Sleipner A was installed, and the FSO was removed from the field. Modification work is ongoing on the platform to prepare for low pressure production as well as the tie-in of the subsea template on the Eirin field.